Titanium Grade 3 vs Ti Grade 15
Titanium · grade comparison
Titanium Grade 3 and Ti Grade 15 are both titanium grades. Ti Grade 15 is the stronger of the two: yield strength 450 MPa (65.3 ksi) against 420 MPa (60.9 ksi) for Grade 3, about 7% more; tensile strength follows at 550 MPa (79.8 ksi) vs 500 MPa (72.5 ksi). On the shop floor, Ti Grade 15 sits in a lower cost tier (high, $$$$) than Grade 3 (specialty, $$$$$).
Ti Grade 15Choose it when strength drives the design, or when cost is the deciding factor.
Grade 3 vs Ti Grade 15: propertiesHow to read these bars
- One bar per material. A full bar is the highest value among all titanium grades in the FabDigit library; each bar is drawn as a share of that.
- The better value (by the usual engineering direction) is in bold. Rows with no direction — density, thermal conductivity — have no bold.
- Values are typical room-temperature figures for the condition named on each card.
- Confirm against the certified mill or resin datasheet before design release.
How to read these bars
- One bar per material. A full bar is the highest value among all titanium grades in the FabDigit library; each bar is drawn as a share of that.
- The better value (by the usual engineering direction) is in bold. Rows with no direction — density, thermal conductivity — have no bold.
- Values are typical room-temperature figures for the condition named on each card.
- Confirm against the certified mill or resin datasheet before design release.
Mechanical
Strength, stiffness, ductility and hardness at room temperature.
Elastic (Young's) Modulus
Tensile Strength (Ultimate)
Yield Strength (0.2% offset)
Compressive Strength
Charpy V-Notch Impact (RT)
Hardness, Rockwell B
Same in both: Shear Modulus 45 GPa6.5 Msi · Bulk Modulus 110 GPa16 Msi · Poisson's Ratio 0.34 · Elongation at Break 20% · Reduction in Area 35% · Shear Strength 380 MPa55.1 ksi · Fatigue Strength (Endurance Limit) 300 MPa43.5 ksi · Fracture Toughness (K_IC) 70 MPa·√m63.7 ksi·√in · Hardness, Brinell 200 HB · Hardness, Vickers 210 HV
Physical
Density and transition temperatures.
Melting Point (Solidus)
Same in both: Density 4.51 g/cm³0.16 lb/in³ · Liquidus Temperature 1,668°C3,034 °F
Thermal
How each material carries heat and how hot it can run.
Thermal Expansion (CTE, 20–100 °C)
Latent Heat of Fusion
Max Service Temperature (continuous)
Min Service Temperature
Same in both: Thermal Conductivity 16.4 W/m·K9.5 BTU/hr·ft·°F · Specific Heat Capacity 523 J/kg·K0.12 BTU/lb·°F
Electrical
Conductivity and insulation.
Electrical Resistivity
Same in both: Electrical Conductivity 3.1 % IACS
Chemical & Environmental
Corrosion and environmental resistance (0–100 scores).
Galvanic Potential (seawater, vs SCE)
Corrosion Resistance
Manufacturability
FabDigit workshop ratings (0–100 scores) — how each material behaves on the machine.
Machinability Rating (AISI 1212 = 100 %)
Formability (cold)
Castability
Brazeability / Solderability
Polishability
Same in both: Machinability 35 / 100 · Weldability 85 / 100
Sustainability
Primary-production footprint per kilogram.
Embodied Energy (primary production)
Embodied Carbon (primary production)
Embodied Water
Same in both: Typical Recycled Content 25%
Common Calculations
Ratios derived from the values above.
Specific Strength (UTS / density)
Specific Stiffness (E / density)
Modulus of Resilience
Thermal Shock Resistance Index
Same in both: Thermal Diffusivity 7 mm²/s
Strength versus weight
Yield strength against density for every titanium grade in the FabDigit library; the compared grades are highlighted. Up and left is stronger for its weight.
Manufacturing and finishing
| Capability | Grade 3 | Ti Grade 15 |
|---|---|---|
| CNC machining | Yes | — |
| Sheet metal | Yes | — |
| Default condition | O | — |
| Relative cost | $$$$$ Specialty | $$$$ High |
| Min. machined wall | 1 mm | — |
| Best machined surface | Ra 1.6 µm | — |
| AlCrN | Yes | — |
| AlTiN | Yes | — |
| Anodizing Type II | Yes | — |
| CVD Al2O3 | Yes | — |
| CVD TiCN | Yes | — |
| CVD TiN | Yes | — |
| Cerakote | Yes | — |
| CrN | Yes | — |
| DLC | Yes | — |
| Electropolishing | Yes | — |
| HVOF Coating | Yes | — |
| MoS2 | Yes | — |
| Multilayer CVD | Yes | — |
| TiAlN | Yes | — |
| TiB2 | Yes | — |
| TiCN | Yes | — |
| TiN | Yes | — |
| WC/C | Yes | — |
They share 1 finish: Plasma Spray.
Grade 3 vs Ti Grade 15 — frequently asked
Is Ti Grade 15 stronger than Grade 3?
Yes. Ti Grade 15 has a typical yield strength of 450 MPa (65.3 ksi) against 420 MPa (60.9 ksi) for Grade 3 — about 7% more. Tensile strength is 550 MPa (79.8 ksi) vs 500 MPa (72.5 ksi).
Which is cheaper, Grade 3 or Ti Grade 15?
Ti Grade 15 is the lower-cost material: it sits in the high tier ($$$$) while Grade 3 is specialty ($$$$$). Part price depends far more on geometry, tolerance and quantity than on raw stock — upload a CAD file for a live quote.
When should I choose Grade 3 over Ti Grade 15?
Pick Ti Grade 15 when strength drives the design, or when cost is the deciding factor.
Ready to make it?
Upload a CAD file and FabDigit prices the part in Grade 3 and Ti Grade 15 side by side — material, machining time, tolerance and finish in one quote. Certified material data ships with the order on request.
Typical handbook values for the conditions named above, normalised for comparison. Hardness on non-Brinell scales is converted approximately for charting only. Request certified data with your order for design-critical properties.